adding quickfix library

quickfix/log/screen/screen_log.go

@@ -0,0 +1,63 @@
+// Copyright (c) quickfixengine.org  All rights reserved.
+//
+// This file may be distributed under the terms of the quickfixengine.org
+// license as defined by quickfixengine.org and appearing in the file
+// LICENSE included in the packaging of this file.
+//
+// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING
+// THE WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A
+// PARTICULAR PURPOSE.
+//
+// See http://www.quickfixengine.org/LICENSE for licensing information.
+//
+// Contact ask@quickfixengine.org if any conditions of this licensing
+// are not clear to you.
+
+package screen
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/quickfixgo/quickfix"
+)
+
+type screenLog struct {
+	prefix string
+}
+
+func (l screenLog) OnIncoming(s []byte) {
+	logTime := time.Now().UTC()
+	fmt.Printf("<%v, %s, incoming>\n  (%s)\n", logTime, l.prefix, s)
+}
+
+func (l screenLog) OnOutgoing(s []byte) {
+	logTime := time.Now().UTC()
+	fmt.Printf("<%v, %s, outgoing>\n  (%s)\n", logTime, l.prefix, s)
+}
+
+func (l screenLog) OnEvent(s string) {
+	logTime := time.Now().UTC()
+	fmt.Printf("<%v, %s, event>\n  (%s)\n", logTime, l.prefix, s)
+}
+
+func (l screenLog) OnEventf(format string, a ...interface{}) {
+	l.OnEvent(fmt.Sprintf(format, a...))
+}
+
+type screenLogFactory struct{}
+
+func (screenLogFactory) Create() (quickfix.Log, error) {
+	log := screenLog{"GLOBAL"}
+	return log, nil
+}
+
+func (screenLogFactory) CreateSessionLog(sessionID quickfix.SessionID) (quickfix.Log, error) {
+	log := screenLog{sessionID.String()}
+	return log, nil
+}
+
+// NewLogFactory creates an instance of LogFactory that writes messages and events to stdout.
+func NewLogFactory() quickfix.LogFactory {
+	return screenLogFactory{}
+}